Amy: Uh I'm such a stereotred person.
Trent: what's that?
Amy: i have A hatred for Mexican cholos, black gangsters, white wiggers, gay flaming people, lesbian dykes, etc!
Trent: uh me too.
Used to describe a person without street smarts; i.e. lacking the common sense required to deal with the potential dangers of real life outside of school.
1: Sure, he gets straight A's and all, but he's extremely streetarded.
2: Damn.
Your everyday normal person, who is not medically retarded, but acts in a way that makes you think, "man, that dumbfuck is retarded!" Used as to not offend medically retarded people.
Man, that fucker almosthit my car pulling out of the parking lot, what the streetard!